There of course is a change log of things 'changed' during the development phase of sipXecs IP PBX 4.0. It includes just about 600 (!) items that were tracked and resolved. You should expect a bug fix release to come out within the next 6 to 8 weeks that will resolve some of the remaining issues that were and will be found. To track progress towards 4.0.1 monitor our tracker. This is also the place where you can see whether an issue you might encounter is already known and in the pipeline. Make sure you vote on your most urgent issues.

The roadmap in our tracker also gives you an idea of release 4.2, which is our next major release. The list currently includes too many items and needs to be scrubbed some more. Make sure you vote on issues important to you. The roadmap on the Wiki will give some more details on 4.2 once it is updated.

And a last nuget: Pawel Pierscionek just published the first version of a PHP API on top of the sipXecs SOAP interface. The ACD wallboard application that comes with it is very nice and has been asked for many times. Thanks Pawel!